Heat regulation



Feb."19, 1935. G. M. RICHARD 1,991,415

HEAT u REGULATION Filed Feb. 3. 1933 v f v I Y Manhunt Patented Feb. 19, 1935 n Application jFebruary'g,

1933, "serial Nb.l 655,018`

olainis.l (ol. 2365-16) This 4inventiongrelates toV temperaturerespon#- sive control mechanism; Thisy invention v has utility .when incorporated in readilydetachable thermo-responsive control n 1 soever in the' furnaceinstallation or equipment. f

vThe, operative `connection to the control chain 12 A5; 1ers for'hotair-furnaces.

. Referring to'vthe 'drawingi Fig.' lis a View of an embodiment of .the inven-V tion in a hot air, furnace installation as forrest-v dence heating, parts-being. broken away; u 1 i ik Fig.2 is, a detail view in plan, ofthe housin for the control unit or regulator;

. 4Figa-Bis an enlarged side view of the adjusting arm for the regulator; Fig. 4 is a plan view of: the

Fig. 6 isa fragmentary view showing the reel versing switch from the line Fig. 4; and

Fig.- 7 is an additional. detail View' of. the reversing switchfrom theiline VII-VII, Fig'. 6.1

Hot .air furnace 1, say as located in the base:

ment of a dwelling.. may be equipped with nre door 2 and ashidoor 3 having adjustable sectionV 4 as a. damper. This hot air. furnace 1 is shownv as .having Vheat dome .5f-withLpocket 6 as a. holderv for heat retaining medium,.say;of. sand-7. From this domeg,v ducts 8v extend to variouspartsof' thedwelling. to be heated; yFrom the fire portioninthe furnace. to which access is' obtained by the'.

', iire door 2, products of combustionare .takenofi by ue 9having riser'section 10and checkpdraft 11., Connected' fromthischeck draftfll tothe damper 4 is: exible line' .orf chain 12v rrpassng about guiderollers 13. 351

checkzdraft 11 as thedamper' 4' is closedin one directionrof movementfof kthe connection 12. Inf the reverse directionmovement of the connection' 12 therewis closing .of the check draft `11 and open-` ing of thedraft damper 4 so that .the heating operation of .the furnace may lbel accelerated:

This operation .of the connecting chain12 is-herein brought aboutl by connection 14 with pulley 15.

Q56 '5* as to check readily the Atemperature changes regulator with the upper` housing lportion broken away; ,f

` 37 on the shaftl whichprotrudesfrom the hous- In carrying out rthe;invention herein, .thermo-5. vresponsive operationv is effective for-opening the Vtherein as such tend toiex'the'bimetallic ele;

ment.22.-

The regulator herein is lone'which; shown,. maybe readily installed with vnoaIteration what-,

may bebutav staple Lorloose link 14 vwith such desired amount of play as `may be convenient fory the particular installation.; vThe drive connec 'l tion is from the usual lighting circuit, ,say by, of

Theline 27 extends directly to ,motor 30- havmi ing shaftBl-carrying. 4pulley 32abo uti which.exf

tends belt 33 to larger'` pulley 34 on shaft 35, as4 a first stage'in speedreduction. This shaft/.351 has thereon worm 36 in rnesh `With worm wheel ing, There is accordingly; aj twostagespeedreduction from the motor .30 inits .one direction of rotation for operatingthewshaft 18.1.. v The line 26herein extends totermnal 38 .at insulation block 39 carried vby the thermo-respon# sive element'22for beingshiftedthereby. From this terminal 38 there lis conductor:40;terminal portion 4l of which is desirably magnetically responsive as Well as beingwaj conductor.: This terminal `41, as Acontacting terminal-,42 on insu-` lation. block -43 `connects`- circuit. throughf line 44 to terminal 45at insulationA block 46; Mounted on this block 46 is movablezterminalg47-from which extendsflexible-helical conductor or pig tail 48 to xed terminal 49 at; this ,block. .From this` terminal 49 extends-conductor 50 to the motor 30. A Accordinglyyat the shifting of the arm 401er c losingof the terminals 41, 4 2, and with the rockable conductor 47 at the terminalt 45,y circuit is completed ;fOrperatingathej Amotor 30. This travel of the motor is;e1fec ted for-pref.v determinedcycle, forniiied with the shaft-182 is cam y51-acting onplunger 5 2 r r 1'ounted in-bracket 53 v`to fforcesuch plunger-52 downward againsty they resistane'pihelical spring, 5.4 .acting .on conan 55. Fixed with this plunger 52 above the collar 55 is eye 56 from which extends insulation link 57 to helical tension spring `58.

This shifting of the plunger 52 moves the eye 56 upward past fulcrum mountingv 59 for the movable switch member 47, and thereby as pass-k ing, insures quick throw or snap operation away f from the terminal 45 to terminal 60.]This terminal 60 has therefrom conductor 61 to terminal 62 at the two-'way switch arm 41, with this ter- 55 l vided with a pair ofi aligned slots 675.

minal 62 corresponding to and opposing the terminal 42. The snap operation of the switch 47 opens the circuit to the motor 30 and thus causes the motor 30 to stop after 180 operation of the shaft 18. y

As the temperature change in the dome 5 is effective to shift the arm 40 from the terminal 42 to the terminal 62, circuit is completed from the line 26 through this thermo-responsive arm 40 and uw termina @2. os the @wenn nos: 4.a. thence by line 61 to the movable arm 47 of the snap cut-out, and thence by the line 50 for a re-operation of the motor 30, a second 180 movement for the arm 16. It is thus seen that from` one limit of swing of the arm 16 as to the chain 12, 180, there is the full throw for arm in eiecting simultaneous opening o; thecheckdraft and closing of the ash pit damper. At the suc# cessive operation of the motor 30, thecqntinuaf. tion for a. second 180 closes the check draft 11 and' opens the damper 4. 1

Insulation block 43 is mounted on frame 63 in the housing'- 19. This insulation block- `i3 is pro- Screws 66 through these' slots 65` engage the frame 63; The insulation block is thusheld for reciprocation in effecting the desired adjustments therefor.

Connected by pivot pin 64 with this insulation block 43 is link 67A having pivotal connection 68 with arm'g ofy shaft 10 mounted in bracket 71 in theV housing 19. 'This shaft 'l0 protrudes from the housing 19 and there has clamp connection 'Z2 x-ing pointer- 7f3 therewith o'rvmovement over. scale 74. From exterion ofthe housing 19 the furnace. attendant may shift thepointer y'lf3 for the'desir-ed range of temperature control as to temperature in the dome 5. This effects an adjustd location of the-insulation block 43 and accordinglyo the position at which the arm 40 maybe eiective foropening connection at one of the terminals and closing' connection at the other of the terminals 42,62." lBeside the flexing effected by this posi-tioningog *thel arm 7,3 there may be additional controlfor-snap yoperation of this arm 40 due to permanent magnets 75, '76, acting upon the magneti'zable terminusV 4l rof the arm 40 at the respective closed positions with thetenninals42,62. Y

To insure a balanced and smooth operation of the movable terminal 41, it may be provided, on the end thereot remote from the contact points, with threaded stem 1? having` oounterweight 78 mijustablyY mounted thereon.

The unit shown is adapted for quick installation in the type o? urnace shown. However, the` various mechanical details may be changed so that the unit is easily" adaptable for use on heating plants involving vapor, hot Water, or steam. Y v

What is claimedland-it is desi-red to secure by Letters Patent is;l

1. A hot airn furnace hav-ing a jacket providing a heat retaining bed, a check draft, a damper,` and a connection therebetween, a portable heaty contrai unit for the furnace embodying a housing having a pocket, said unit mounted on the heat retaining bed and having the pocket extending thereinto, an arm exterior of the housing to engage the connection, mechanism interior of the housing to operate the arm, and a thermostat in the pocket to control the mechanism.

2. A furnace havinga jacket providing a. heat retaining bed, a check draft, a. damper, and a comedien therebetween? a. heat control. unit for the furnace embodying .a housing' having a pocket, said unit mounted on the heat retaining bed and having the pocket extending thereinto, arm exterior of the housing to engage the connection, mechanism interior of the housing to operate the arm, a thermostat in the pocket to control the mechanism, said thermostat serving as a switch arm, a bracket in the housing, a pair: og contacts carried by the bracket between which the thermostat operates in control of the mechanism, vand means exterior of the housing to shift said contacts as to the thermostat.

A3. A furnace havinga jacket providing a heat retaining bed, a check draft, a damper, and a connection therebetween, a heat control unit for the furnace embodying a housing `having a pocket, said unit mounted on theV heat retaining bed and having a pocket extending thereinto, an arm exteriorI of the housing to engage the connection, mechanism interior of the housing to operate the arm, a thermostat in the pocket to control the mechanism,.said thermostat serving as a switch arm, a bracket in the housing, a pair of contacts carried by the bracket between which the thermostat operates in control of the mechanism, and a magnet. adjacent one f the contacts insuring snap action bythe thermostat with the. contact.

4. A furnace having a fire box and a jacket, a checkcig-aft, a damper. and a flexiblemechanical connection therebetween, al portable heat control 1er the furnace embodying a. housing con.k

tasting the jacket. for direct. heat radiation thereinto, an arm exterior of the housingv to engage the. connection, an electric motor interior of the housing, to operate `the arm, afpair ofcontacts, and a thermostat mounted in said housing to be afected by' said direct heat radiation'and servingas .aswitch arm between thev contacts. to control said motor.

A furnace having a. nre `box; and a jacket, a'check draft, a damper and a exible mechan. ital connection therebetween, a portable heat control unit for the furnace embodying a housing GOntanting the jacket. for direct, heat radiation therexnto, au arm" exterior 'ci' the housingy to engagethe connection, electric motor interior of; the housinto, operate the arm including a pair ofcontacts. a thermostat mounted in said housingtQ be aected by said direct. heat radia-- tion and serving' as. a switch armv between the @Macias to controlsaid motor, and meansfor contacts as. tothe thermostat.

GRANT' M. RICHARD. 

